陆海杂种高代回交自交系纤维细度性状相关性分析

 利用陆地棉34B与海岛棉Giza70杂交所得的稳定的高代回交自交系BC₂F_4:6 、BC₂F_4:7家系，开展了三个环境下纤维细度等品质性状的相关分析。结果表明：1)纺纱均匀指数与长度、整齐度、比强度呈极显著正相关，与伸长率呈极显著负相关。纤维长度和比强度间均存在极显著的正相关，与伸长率呈极显著负相关。2) HVI 900测定的麦克隆值与比强度和纺纱均匀指数呈极显著负相关；成熟度比率与麦克隆值呈显著或极显著正相关，与线密度呈极显著负相关，与其它性状间的相关性三个环境下都不一致；线密度与纺纱均匀指数呈极显著正相关，与长度、比强度均达到极显著或显著负相关，与整齐度不相关，与伸长率为负相关。相对而言，线密度与各性状的相关性要比HVI 900测定的麦克隆值和成熟度比率稳定，受环境影响小，有必要进一步加强对线密度的选择及深入研究。

Correlation Analysis on Fiber Fineness-related Traits in Advanced Backcross Lines between Upland Cotton(G. hirsutum L.) and Island Cotton(G. barbadense L.)

The stable BC2F4:6,BC2F4:7 lines,which were obtained from combination between 34B and Giza70 and backcrossed with 34B as recurrent parent,were used to analyse the correlation of fiber fineness related traits under three environments.The results showed:firstly,spinning uniformity index was significantly positive correlated with fiber length,uniformity and strength;significantly negative correlated with elongation.Fiber length was significantly positive correlated with strength,significantly negative correlat...